Nanostructured p-type Cr/V<inf>2</inf>O<inf>5</inf> thin films with boosted thermoelectric properties

Joana Loureiro; Joao R. Santos; Adriana Nogueira; Frederic Wyczisk; Laurent Divay; Sebastian Reparaz; Francesc Alzina; Clivia M. Sotomayor Torres; John Cuffe; Fatima Montemor; Rodrigo Martins; Isabel Ferreira

doi:10.1039/c3ta15168a

Nanostructured p-type Cr/V<inf>2</inf>O<inf>5</inf> thin films with boosted thermoelectric properties

Joana Loureiro, Joao R. Santos, Adriana Nogueira, Frederic Wyczisk, Laurent Divay, Sebastian Reparaz, Francesc Alzina, Clivia M. Sotomayor Torres, John Cuffe, Fatima Montemor, Rodrigo Martins, Isabel Ferreira

Research output: Contribution to journal › Article › Research › peer-review

18 Citations (Scopus)

Abstract

The urgent need for non-toxic and abundant thermoelectric materials has become a significant motivation to improve the figures of merit of metal oxides in order to remove the barrier towards their widespread use for thermoelectric applications. Here we show the influence of a Cr layer in boosting the thermoelectric properties of vanadium pentoxide (V2O5) thin films, deposited by thermal evaporation and annealed at 500 °C. The Cr to V2O5 thickness ratio controls the morphological and thermoelectric properties of the thin films produced. The optimized Seebeck coefficient and power factor values at room temperature are +50 μV K -1 and 7.9 × 10-4 W m-1 K-2, respectively. The nanograin structure of the films is responsible for an improvement in the electrical conductivity up to 3 × 105 (Ω m)-1 with a typical thermal conductivity of 1.5 W m -1 K-1. These results combine to yield promising p-type thermoeletric CrV2O5 thin films with a ZT of 0.16 at room temperature. This journal is © the Partner Organisations 2014.

Original language	English
Pages (from-to)	6456-6462
Journal	Journal of Materials Chemistry A
Volume	2
Issue number	18
DOIs	https://doi.org/10.1039/c3ta15168a
Publication status	Published - 14 May 2014

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Loureiro, Joana ; Santos, Joao R. ; Nogueira, Adriana ; Wyczisk, Frederic ; Divay, Laurent ; Reparaz, Sebastian ; Alzina, Francesc ; Sotomayor Torres, Clivia M. ; Cuffe, John ; Montemor, Fatima ; Martins, Rodrigo ; Ferreira, Isabel. / Nanostructured p-type Cr/V<inf>2</inf>O<inf>5</inf> thin films with boosted thermoelectric properties. In: Journal of Materials Chemistry A. 2014 ; Vol. 2, No. 18. pp. 6456-6462.

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title = "Nanostructured p-type Cr/V2O5 thin films with boosted thermoelectric properties",

abstract = "The urgent need for non-toxic and abundant thermoelectric materials has become a significant motivation to improve the figures of merit of metal oxides in order to remove the barrier towards their widespread use for thermoelectric applications. Here we show the influence of a Cr layer in boosting the thermoelectric properties of vanadium pentoxide (V2O5) thin films, deposited by thermal evaporation and annealed at 500 °C. The Cr to V2O5 thickness ratio controls the morphological and thermoelectric properties of the thin films produced. The optimized Seebeck coefficient and power factor values at room temperature are +50 μV K -1 and 7.9 × 10-4 W m-1 K-2, respectively. The nanograin structure of the films is responsible for an improvement in the electrical conductivity up to 3 × 105 (Ω m)-1 with a typical thermal conductivity of 1.5 W m -1 K-1. These results combine to yield promising p-type thermoeletric CrV2O5 thin films with a ZT of 0.16 at room temperature. This journal is {\textcopyright} the Partner Organisations 2014.",

author = "Joana Loureiro and Santos, {Joao R.} and Adriana Nogueira and Frederic Wyczisk and Laurent Divay and Sebastian Reparaz and Francesc Alzina and {Sotomayor Torres}, {Clivia M.} and John Cuffe and Fatima Montemor and Rodrigo Martins and Isabel Ferreira",

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month = may,

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doi = "10.1039/c3ta15168a",

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Nanostructured p-type Cr/V<inf>2</inf>O<inf>5</inf> thin films with boosted thermoelectric properties. / Loureiro, Joana; Santos, Joao R.; Nogueira, Adriana; Wyczisk, Frederic; Divay, Laurent; Reparaz, Sebastian; Alzina, Francesc; Sotomayor Torres, Clivia M.; Cuffe, John; Montemor, Fatima; Martins, Rodrigo; Ferreira, Isabel.

In: Journal of Materials Chemistry A, Vol. 2, No. 18, 14.05.2014, p. 6456-6462.

Research output: Contribution to journal › Article › Research › peer-review

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AU - Loureiro, Joana

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AU - Wyczisk, Frederic

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AU - Reparaz, Sebastian

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AU - Sotomayor Torres, Clivia M.

AU - Cuffe, John

AU - Montemor, Fatima

AU - Martins, Rodrigo

AU - Ferreira, Isabel

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AB - The urgent need for non-toxic and abundant thermoelectric materials has become a significant motivation to improve the figures of merit of metal oxides in order to remove the barrier towards their widespread use for thermoelectric applications. Here we show the influence of a Cr layer in boosting the thermoelectric properties of vanadium pentoxide (V2O5) thin films, deposited by thermal evaporation and annealed at 500 °C. The Cr to V2O5 thickness ratio controls the morphological and thermoelectric properties of the thin films produced. The optimized Seebeck coefficient and power factor values at room temperature are +50 μV K -1 and 7.9 × 10-4 W m-1 K-2, respectively. The nanograin structure of the films is responsible for an improvement in the electrical conductivity up to 3 × 105 (Ω m)-1 with a typical thermal conductivity of 1.5 W m -1 K-1. These results combine to yield promising p-type thermoeletric CrV2O5 thin films with a ZT of 0.16 at room temperature. This journal is © the Partner Organisations 2014.

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